From in- +‎ harmony.

• (UK) IPA^(key): /ɪnˈhɑːməni/
• (US) IPA^(key): /ɪnˈhɑɹməni/
• Rhymes: -ɑː(ɹ)məni

inharmony (countable and uncountable, plural inharmonies)

1. Lack of harmony.
   • 1909, Ambrose Bierce, “What I Saw of Shiloh”, in The Collected Works of Ambrose Bierce, Vol. I:

     Here in the night stretches a wide and blasted field studded with half-extinct fires burning redly with I know not what presage of evil. . . . To what monstrous inharmony of death was it the visible prelude?

   • 1912, Rex Ellingwood Beach, chapter 22, in The Iron Trail: An Alaskan Romance:

     Tom Slater made a congratulatory speech—in reality, a mournful adjuration to avoid the pitfalls of matrimonial inharmony.

• disharmony

• “inharmony”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.